Machine for making concrete pavement



1. w. HELTZEL.

MACHINE FOR MAKING CONCRETE PAVEMENT.

' APPLICATiON FILED AUG.4, 1920. v

1A2K956. Pat nt d ept. 5, 1922,,

' 3 SHEETSSHEET' 1.

I. W. HELTZEL. MACHINE FOR MAKING CONCRETE PAVEMENT.

APPLlCATlON HLED AUQ. 4,1920.

PatentedSept. 5, 1922.

3 SHEETS-SHEET 2.

un/bums J. w. HELTZEL. MACHINE FOR MAKING CONCRETE PAVEMENT.

APPLICATION FILED AUG- 1920.

PatentedSept. 5, 1922.

3 SHEETSSHEET 3.

A amoe/wtoz fisa K121172558 Patented Sept a I v. a v

' JOSEIEH' wt nntrznt, OF WARREN, onro;

MACHINE. FOR MAK N O R TE PAVEMENT.

rrii ar cafi-l d liens 4, 1 se a 01 00.

p fu l Machine for Making Concrete Pavement, of which the following is a spe cificashowi'n the connection tries";

tion.

This: invention relates to aroaLol, building machine and has for an object the provision of means for constructing a, smooth, road of uniform density with only the minimum of effort being exerted by the operator.

Another objectof; this invention is to pr o-, vide a road building machine comprising means for leveling and scrapingthe road surface, means for tamping the surface, and. means for finishing the surface, as well as means for imparting a curvilinear motion to the road-.engagingtools of the device.

A further object or this invention is to provide a road building machine of generally improved construction whereby the de-v vice will be simple,'durable andv inexvenr sive in construction, as well asfconvenient practical,.serviceable and eff cient in its; use. lVith the above and other objects in view which will appear as the descriptionproceeds, the. invention resides in the combination and arrangement of parts and in the details of construction hereinafter odescribed and claimed, it being understood that within the scope of vwhat is claimed, changes in the precise embodiment of the invention shown can be madewithout departing from the spirit of the invention.

The invention has been illustrated in its preferred embodiments in the accompanying drawings, wherein:

Figure 1 is a top plan view the device;

Figure 2 is an end elevation of the in vention; I t

Figure 3 is a sectional view taken on the line 33 of Figure 1. a

Figure i is a fragmental sectional view a t e one oi? the propelling wheels and its axle; H

l* gur ,is a t a sve Se tion Vi w taken on the'line 5 5j of Figures; I

rigure 6 is a transverse 'sectionalview ake h ugh [one 9 the edi i ns 3. 9 1 7 v Figure 7 a diagrammaticlview inn crating the path fofftravel of the several r dengag g t s Figure 8'is. an elevation of one of the spacing, blocks l Referring ,to the drawings, there are shown spaced track members 10 which placed parallel with and at itch sidefof the i 1,427,956 PATENT orator;-

roaid bed uponwhich it is desired t b-uild a road.

Supporting and propelling wheels 11 are journaled on axles 12 which, are secured to the supporting beams 18. These wheels 11 engage the tracks l0, a nd the flanges 0f the wheels are held constantly in engage ment withthe tracksor rails 10 by meansof helical extension springs 15 which surround theaxles or spindles 12, and one end of each spr ng engages a flange. 16, while the op posed end, of each spring 15 engages a ring or washer 17, which in turn bears against the outer face of the Wheel 1 1 The, supporting beams 13 are arranged in parallel relation and are united. adjacent their op: posed terminals by means of sill plates 01; brackets 18, thereby'providing a rigid frame structure. Each bracket 18, is provided with an upstanding flange 1 9 which carries a bearing 20. Intermediatebrackets 21. are secured to the'supporting beams 13 and each bracket 21is provided with bearing memhers 22'. A main or operating shaft 23 is journaled in the bearings 20 and QZand this shaft carries spaced eccentric blocks 2i which support and cooperate with eccentric straps 25. Those straps 25 which are positioned at the outer ends of the shaft have opposed attaching cars 26 which are pivotally secured to o posed supporting arms 27, andithe arms 2r have bearings 28 secured tothe outer ends thereof in which are secured short shaft secticns or spindles 29. These spindles 29v have supporting flanged-Wheels 30 jo urnalled thereon-and the flange of each'wheel 30 is held constantly in engagement with the tracks 10 by helical extension springs 31, which coopcrates with the wheel 30 in the same manner as the springs 15 cooperate with the wheels 11, The eccentricfstr'aps 25 have relatively long attaching cars 32 extending therefrom which are provided with spaced apertures 33 for the reception of adjusting rods or shafts 86L Each adjusting "rod 34 has an enlarged eccentric portion 35 formed of the auxiliary frame 35 has a perpendicular extension 36. Each extension 36 is provided With an elongated slot 37 which is adapted to receive a securing bolt or member 38 that extends through a slot formed in the forward arms 27 thereby rigidly, securing the frame 35 to this arm;

The frames 35 have spaced I-beams 39 and 40 rigidly secured. thereto and each Lbeam 39 and 40 has a spacing block 41 secured thereto by means of bolts or other securing devices 42. The I-beam 39 supports a scraping blade or templet 43 by extending the bolts 42 through both the block 41 and the templet 43 and the I-beam 40 support a tamping tool or blade 44 in a similar man ner.

U-shaped auxiliary frames 45 are adjustably supported by the rearwardly extending arms 27, and each frame 45 comprises an intermediate portion 46 and per pendicularly disposed terminal members 47 and 48. The terminal. members 47 have spaced apertures 49 formed therein for the reception of bolts 50 which extend through slots 51 formed in the rearward arm 27, thereby rigidly securing the terminal member 47 of each frame 45 to these arms. Each terminal member 48 is adjustably secured to the rearward arm 27 by means of an adjusting rod 52 having an enlarged eccentric portion 53 which is j ournaled in an aperture formed in the member 48, while the rod is journaled in the arm 27. The rod 52 is held against axial movement by means of a nut 55, and these rods 52 are provided at their opposed terminal with wrench-engaging extension 56, and similar wrenchengaging extension 57 are formed on opposed terminals of the adjusting rods 34, so that a common wrench may be employed to adjust both auxiliary frames. An I-beam 58 is secured to the intermediate portions 45 of these adjustable auxiliary frames, and a spacing block 59 is carried by the beam 58, which block, in turn, engages a finishing trowel or tool 60 that is secured to lower flanges of the I-beam 58 by means of bolts or other securing devices 61. i

The intermediate eccentric straps 25 are operabiy connected to arms of links which are adjustably connected at their outer ends to attaching plates or member 63 carried by the I-beam 58, and the intermediate portion of the I-beams 39 and 40 are operably connected to the 6 intermediate straps 25 by means of arms or links 64 and adjustable auxiliary frames 65 that are similar to the auxiliary frames 35.

In order to operate the road-engaging tools 43, 44 and60 an engine or motor 66 of any preferredtype is provided and includes a crank shaft 67 which is operably connected to a drive shaft 68, through the in strumentality of a gear or transmission box 69 of any preferred construction. A sprocket 70 is loosely mounted on the shaft 68 and this sprocket 70 is connected to a sprocket 71, that is locked to the shaft 23, by means of a sprocket chain 73. The sprocket 70 is operably connected to the drive shaft 68 through the instrumentality of a slidable clutch 74 that is keyed to the shaft 68. A second sprocket 75 is loosely mounted on the shaft 68, which sprocket is operably connected to this shaft by means of a slidable clutch 76, and a sprocket chain 77 is trained around both the sprocket 75, and a sprocket 78 carried by a propelling shaft 79 that is journaled in bearings 80 supported by the I-beam 13. A second propelling shaft 81 is journalled in bearings 82 supported by the I-beams 13. The shaft 81 is operably connected to the shaft 79 by means of a sprocket 83, carried by the shaft 79, and a sprocket 84, carried by the shaft .81, and a sprocket chain 85 that is trained over both sprockets and spaced idlers. The opposed terminals of the propelling shafts 79 and 81 have pinions 86 secured thereto which pinion mesh with internal gears 87 formed on the wheels 11. j I

In operation the major adjustments of the road engaging tools relative to the roadbed may be eifectedby adjusting the bolts 38 and 50, and the minor adjustments can be made by rotating the adjusting rods 34 and 52 by means of a common wrench. The

tool operating shaft 23 may be driven indei pendently of the propelling shafts 79 and 81 by simply throwing in the clutch 74 and disengaging the clutch 76; or the propelling shaft may be driven and the operating shaft disconnected by simply throwing out the clutch 74 and engaging the clutch 76. By shifting the lever of the transmission 69, either the operating shaft 23 or the propelling shafts 79 may be driven at various speeds or reversed to meet varying conditions. When building the road the entire machine is propelled slowly forward and the road engaging tools are driven at rela tively higher speed. The scraping blade or templet 43 sometimes called the strike-off, is curved transversely by increasing the thickness ofthe spacing block 41 gradually towards its opposed ends, thereby shaping the templet to form a practical crown or curve on the surface of the road. As the machine moves forwardly a curvilinear motion is imparted to the templet 43 and causes it to travel in an elliptical pathto thereby accurately level the road surface. Then the tamper v44 engages theformed road surface and produces a compact roadway. A curvilinear motion is imparted to the tamper 44, butsinceit positioned adjacent the eccentric 24 its path of travel approximates a circle and increases the poundin of the tamper. The finishing trowe 60 has action its operative face inclined and travels in frame, a road engaging tool supported by the auxiliary frame, and meansfor imparting a positive curvilinear motion to the road engaging tool.

2. A road building machine including an adjustably supported road engaging tool and means for imparting a positive curvilinear motion to the tool along fixed paths of travel.

3. A road building machine including a wheel-supported frame, auxiliary frames adjustably secured to the wheel supported frame, separate road-engaging tools carried by the auxiliary frames, means for imparting a curvilinear motion to a selected roadengaging tool, the path of travel of the selected tool approximating an ellipse, and means for imparting a curvilinear motion to selected road-engaging tool, the path of travel of the said tool approximating a circle.

4. A road building machine including a rigid wheel supported frame, an auxiliary frame having separate components movable relative to each other, and separateroad engaging tools supported by the auxiliary frame, means for imparting a curvilinear motion to the tools, the path of movement of the tool being determined by the position of the tool relative to the auxiliary frame.

5. A road-building machine including supporting and propelling wheels, tracks for supporting the wheels, a frame supported by the said wheels, auxiliary frames adjustably secured to the first-mentioned frame, road-engaging tools carried by the auxiliary frames, means for operating the said tools, and means for yieldingly holding the wheels against lateral disengagement from the tracks to compensate for lateral uneveness in the tracks.

6. A road building machine including ,a wheel supported frame, an operating shaft journaled on the wheel-supported frame, eccentric blocks carried by the shaft, eccentric straps encircling the blocks, supporting arms pivotall secured to the said straps, supporting whee s journaled to the outer terminals of the said arms, auxiliary frames adjustably secured to the supportingarms, road-engaging tools carried by the auxiliary frames, means for propelling the machine, and means for rotating the operating shaft to thereby impart a curvilinear motion to the road-engaging tools.

7. A road building machine including a frame, a movable arm operably associated with the frame, means for operating the arm to impart a circular movement to oneterminal of the arm and a right line movement to the opposed terminal of the arm,

and a road engaging tool adjustably sup-" ported by the arm, the movement of the tool being determined by its position relative to the arm.

8. A road building machine including a wheel supported frame, a movable arm operably associated with the frame, an

auxiliary frame supported by the arm, means for effecting major and minor adjust-ments between the auxiliary frame and the arm, a road engaging tool carried by the auxiliary frame, and means for driving the arm to impart a circular movement to the inner end of the arm and a right line movement to the outer end of the arm;

9. A'road building machine including a wheel supported frame an auxiliary frame, a supporting arm operably connected with the auxiliary frame, a supporting wheel journaled to the outer end of the supporting arm, road-engaging tools carried by the auxiliary frame, an eccentric mounted for rotation on the wheel supported frame and operably connected with the supporting arm to impart a curvilinear motion to the inner and intermediate portions of the supporting arm and auxiliary frame and a right line movement to the outer end of the said arm.

In testimony thatI claim the foregoing 

